linux-kernel - Re: [PATCH v2 2/3] drm/fb-helper: Rename preferred_bpp drm_fbdev_generic

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Message-ID: <ac202e93-cde2-99fa-5aca-abdc1cf6a3bf@redhat.com>
Date:   Mon, 2 May 2022 18:57:04 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-mediatek@...ts.infradead.org,
        linux-mips@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-sunxi@...ts.linux.dev, spice-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v2 2/3] drm/fb-helper: Rename preferred_bpp
 drm_fbdev_generic_setup() parameter

On 5/2/22 18:07, Laurent Pinchart wrote:
> Hi Javier,
> 
> Thank you for the patch.
> 
> On Mon, May 02, 2022 at 05:38:59PM +0200, Javier Martinez Canillas wrote:
>> By default the bits per pixel for the emulated framebuffer device is set
>> to dev->mode_config.preferred_depth, but some devices need another value.
>>
>> Since this second parameter is only used by a few drivers, and to allow
>> drivers to use it for passing other configurations when registering the
>> fbdev, rename @preferred_bpp to @options and make it a multi-field param.
>>
>> The DRM_FB_OPTION() and DRM_FB_GET_OPTION() macros are provided to drivers
>> for computing options bitfield values and getting the values respectively
>>
>> For now, only the DRM_FB_BPP option exists but other options can be added.
>>
>> Suggested-by: Thomas Zimmermann <tzimmermann@...e.de>
>> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
>> Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>
>> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>> ---
>>
>> Changes in v2:
>> - Rename DRM_FB_SET_OPTION() to DRM_FB_SET() and make more clear in the
> 
> I assume you meant DRM_FB_OPTION() here, not DRM_FB_SET().
> 
>>   kernel-doc what this macro does (Laurent Pinchart).
>>

Right, that's a typo. The patch description and content are correct though.

I'll fix the patch history log in v3.

-- 
Best regards,

Javier Martinez Canillas
Linux Engineering
Red Hat